Datasheet

PIN
NAME FUNCTIONMAX3222
MAX3232 MAX3237 MAX3241
DIP/SO SSOP
1 1 — 13 23 EN Receiver Enable. Active low.
2 2 1 28 28 C1+
Positive Terminal of Voltage-Doubler Charge-Pump
Capacitor
3 3 2 27 27 V+ +5.5V Generated by the Charge Pump
4 4 3 25 24 C1-
Negative Terminal of Voltage-Doubler Charge-Pump
Capacitor
5 5 4 1 1 C2+ Positive Terminal of Inverting Charge-Pump Capacitor
6 6 5 3 2 C2- Negative Terminal of Inverting Charge-Pump Capacitor
7 7 6 4 3 V- -5.5V Generated by the Charge Pump
8, 15 8, 17 7, 14
5, 6, 7,
10, 12
9, 10, 11 T_OUT RS-232 Transmitter Outputs
9, 14 9, 16 8, 13 8, 9, 11 4–8 R_IN RS-232 Receiver Inputs
10, 13 10, 15 9, 12 18, 20, 21 15–19 R_OUT TTL/CMOS Receiver Outputs
11, 12 12, 13 10, 11
17, 19, 22,
23, 24
12, 13, 14 T_IN TTL/CMOS Transmitter Inputs
16 18 15 2 25 GND Ground
17 19 16 26 26 V
CC
+3.0V to +5.5V Supply Voltage
18 20 — 14 22 SHDN Shutdown Control. Active low.
— 11, 14 — — — N.C. No Connection
— — — 15 — MBAUD
MegaBaud Control Input. Connect to GND for normal
operation; connect to V
CC
for 1Mbps transmission rates.
— — — 16 20, 21 R_OUTB
Noninverting Complementary Receiver Outputs.
Always active.
Pin Description
MAX3222/MAX3232/
MAX3237/MAX3241
3.0V to 5.5V, Low-Power, Up to 1Mbps,
True RS-232 Transceivers
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